Datasheet LT3693 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 36V, 3.5A, 2.4MHz Step-Down Switching Regulator |
| Pages / Page | 24 / 3 — The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply … |
| File Format / Size | PDF / 315 Kb |
| Document Language | English |
The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply over the full operating
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LT3693
The ELECTRICAL CHARACTERISTICS
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBOOST = 15V, VBD = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VBD = 0, Not Switching 1 10 μA Minimum Bias Voltage (BD Pin) 2.7 3 V Feedback Voltage 780 790 800 mV ● 775 790 805 mV FB Pin Bias Current (Note 3) VFB = 0.8V, VC = 0.4V ● 10 40 nA FB Voltage Line Regulation 4V < VIN < 36V 0.002 0.01 %/V Error Amp gm 525 μMho Error Amp Gain 2000 VC Source Current 60 μA VC Sink Current 60 μA VC Pin to Switch Current Gain 5.3 A/V VC Clamp Voltage 2.0 V Switching Frequency RT = 8.66k 2.2 2.45 2.7 MHz RT = 29.4k 1.0 1.1 1.25 MHz RT = 187k 200 230 260 kHz Minimum Switch Off-Time ● 60 150 nS Switch Current Limit Duty Cycle = 5% 4.6 5.4 6.0 A Switch VCESAT ISW = 3.5A 335 mV Boost Schottky Reverse Leakage VSW = 10V, VBD = 0V 0.02 2 μA Minimum Boost Voltage (Note 4) ● 1.5 2.0 V BOOST Pin Current ISW = 1A 35 60 mA RUN/SS Pin Current VRUN/SS = 2.5V 5 8 μA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Threshold Offset from Feedback Voltage VFB Rising 65 mV PG Hysteresis 10 mV PG Leakage VPG = 5V 0.1 1 μA PG Sink Current VPG = 0.4V ● 200 800 μA SYNC Low Threshold 0.5 V SYNC High Threshold 0.8 V SYNC Pin Bias Current VSYNC = 0V 0.1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Bias current fl ows out of the FB pin. may cause permanent damage to the device. Exposure to any Absolute
Note 4:
This is the minimum voltage across the boost capacitor needed to Maximum Rating condition for extended periods may affect device guarantee full saturation of the switch. reliability and lifetime.
Note 2:
The LT3693E is guaranteed to meet performance specifi cations from 0°C to 125°C. Specifi cations over the –40°C to 125°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LT3693I specifi cations are guaranteed over the –40°C to 125°C temperature range. 3693f 3
The ELECTRICAL CHARACTERISTICS
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBOOST = 15V, VBD = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VBD = 0, Not Switching 1 10 μA Minimum Bias Voltage (BD Pin) 2.7 3 V Feedback Voltage 780 790 800 mV ● 775 790 805 mV FB Pin Bias Current (Note 3) VFB = 0.8V, VC = 0.4V ● 10 40 nA FB Voltage Line Regulation 4V < VIN < 36V 0.002 0.01 %/V Error Amp gm 525 μMho Error Amp Gain 2000 VC Source Current 60 μA VC Sink Current 60 μA VC Pin to Switch Current Gain 5.3 A/V VC Clamp Voltage 2.0 V Switching Frequency RT = 8.66k 2.2 2.45 2.7 MHz RT = 29.4k 1.0 1.1 1.25 MHz RT = 187k 200 230 260 kHz Minimum Switch Off-Time ● 60 150 nS Switch Current Limit Duty Cycle = 5% 4.6 5.4 6.0 A Switch VCESAT ISW = 3.5A 335 mV Boost Schottky Reverse Leakage VSW = 10V, VBD = 0V 0.02 2 μA Minimum Boost Voltage (Note 4) ● 1.5 2.0 V BOOST Pin Current ISW = 1A 35 60 mA RUN/SS Pin Current VRUN/SS = 2.5V 5 8 μA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Threshold Offset from Feedback Voltage VFB Rising 65 mV PG Hysteresis 10 mV PG Leakage VPG = 5V 0.1 1 μA PG Sink Current VPG = 0.4V ● 200 800 μA SYNC Low Threshold 0.5 V SYNC High Threshold 0.8 V SYNC Pin Bias Current VSYNC = 0V 0.1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Bias current fl ows out of the FB pin. may cause permanent damage to the device. Exposure to any Absolute
Note 4:
This is the minimum voltage across the boost capacitor needed to Maximum Rating condition for extended periods may affect device guarantee full saturation of the switch. reliability and lifetime.
Note 2:
The LT3693E is guaranteed to meet performance specifi cations from 0°C to 125°C. Specifi cations over the –40°C to 125°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LT3693I specifi cations are guaranteed over the –40°C to 125°C temperature range. 3693f 3
